Switch cabinet bus system and air-insulated medium-voltage switchgear

Abstract

The utility model belongs to the technical field of electrics, and particularly relates to a switch cabinet bus system and an air insulation medium voltage switchgear, the switch cabinet bus system comprises a bus, one end of the bus is a hollow structure; the connecting piece is inserted into the hollow structure of the bus and is fixedly connected with the bus; and a static contact, one end of the static contact is provided with a positioning hole, one end of the bus inserted with the connecting piece can be inserted in the positioning hole and is tightly attached to the positioning hole, and the static contact is fixedly connected with the connecting piece, so that the static contact is fixedly connected with the bus. The connecting piece embedded in the bus is connected with the static contact, so that the problems of difficulty in lap joint between the bus and the static contact and high production cost can be effectively solved, the production process between the tubular bus and the static contact is simpler, and the assembly is more convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrical technology, and particularly relates to a switch cabinet bus system and an air-insulated medium-voltage switchgear. BACKGROUND

[0002] The switch cabinet is a very important device in the power system, and a large number of components, insulating parts and conductive parts such as circuit breakers, contact boxes and copper bars are arranged in the switch cabinet.

[0003] At present, most of the switch cabinets use tubular bus bars to replace the traditional flat bus bars, which can greatly save the amount of copper. However, the connection mode between the tubular bus bar and the static contact in the prior art is complex, and the connection cost is high. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the problem of complex connection mode and high connection cost between the tubular bus bar and the static contact in the prior art.

[0005] The application provides a switch cabinet bus system in a first aspect, comprising: a bus bar, one end of the bus bar being a hollow structure; a connecting piece, the connecting piece being inserted into the hollow structure of the bus bar and being fixedly connected with the bus bar; and a static contact, one end of the static contact being provided with a positioning hole, one end of the bus bar provided with the connecting piece being capable of being inserted into the positioning hole and being tightly fitted with the positioning hole, and the static contact being fixedly connected with the connecting piece so as to be fixedly connected with the bus bar.

[0006] In an exemplary embodiment of the application, the outer wall of the bus bar is fitted with the inner wall of the positioning hole; in the direction from the bus bar to the static contact, the outer diameter of the bus bar gradually decreases, and the hole diameter of the positioning hole gradually decreases.

[0007] In an exemplary embodiment of the application, one side of the connecting piece facing the static contact is provided with a first mounting hole extending in the axial direction thereof; the bottom of the positioning hole is provided with a second mounting hole extending in the axial direction thereof, the second mounting hole corresponding to the first mounting hole when the bus bar is inserted into the positioning hole; and the switch cabinet bus system further comprises a fixing piece inserted into the first mounting hole and the second mounting hole to connect the static contact and the connecting piece.

[0008] In an exemplary embodiment of the application, one side of the connecting piece facing the static contact is provided with a protruding portion protruding towards one side of the static contact, and the end face of the protruding portion facing the static contact is closer to the bottom wall of the positioning hole than the end face of the bus bar facing the static contact.

[0009] In an exemplary embodiment of the present application, the busbar is provided with a first limiting hole, and the connecting piece is provided with a second limiting hole, the second limiting hole corresponding to the first limiting hole when the connecting piece is inserted into the hollow structure of the busbar; the switch cabinet busbar system further comprises a fastener, the fastener being inserted into the first limiting hole and the second limiting hole to fix the connecting piece in the hollow structure of the busbar.

[0010] In an exemplary embodiment of the present application, the switch cabinet busbar system further comprises a first fixing block and a second fixing block connected to each other, the busbar being clamped between the first fixing block and the second fixing block, the first fixing block and the second fixing block being fixedly connected with the busbar and the connecting piece through the fastener.

[0011] In an exemplary embodiment of the present application, the fastener comprises a first fastener for connecting the first fixing block, the busbar and the connecting piece, and a second fastener for connecting the second fixing block, the busbar and the connecting piece, the second fastener being oppositely arranged with the first fastener.

[0012] In an exemplary embodiment of the present application, the first fixing block and the second fixing block are each provided with a plurality of protrusions; the switch cabinet busbar system further comprises a contact box, the contact box being a sleeve structure with one end being open and the other end being provided with a fixing plate, the fixing plate being provided with a plurality of holes corresponding to the protrusions, the protrusions being capable of being inserted into the holes to fix the first fixing block and the second fixing block on the contact box.

[0013] In an exemplary embodiment of the present application, the first fixing block and the second fixing block are provided with heat dissipation holes.

[0014] The second aspect of the present application provides an air-insulated medium voltage switchgear comprising the switch cabinet busbar system as described in any one of the above.

[0015] The switch cabinet busbar system and the air-insulated medium voltage switchgear of the present application have at least the following advantages

[0016] Advantages:

[0017] The switch cabinet busbar system in the application comprises a busbar, a connecting piece and a static contact, the connecting piece is inserted into the hollow structure at one end of the busbar and fixedly connected with the busbar; the busbar with the embedded connecting piece can be inserted into the positioning hole of the static contact and tightly fit with the positioning hole to prevent relative sliding between the busbar and the positioning hole. In addition, the static contact is connected with the connecting piece embedded in the busbar to further improve the connection tightness between the static contact and the busbar. By connecting the connecting piece embedded in the busbar with the static contact, the application can effectively solve the problems of difficult lapping and high production cost between the busbar and the static contact, so that the production process between the tubular busbar and the static contact is more simplified and the assembly is more convenient.

[0018] Other characteristics and advantages of the application will become apparent from the following detailed description, or will be learned by practice of the application.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings incorporated into the specification and forming a part thereof illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0021] Figure 1 A structural schematic diagram of the switch cabinet busbar system provided by the embodiment of the application is shown.

[0022] Figure 2 A structural schematic diagram of the connecting piece provided by the embodiment of the application is shown. Figure 1 A sectional structure schematic diagram of the A-A' section line in the figure is shown.

[0023] Figure 3 A structural schematic diagram of the connecting piece provided by the embodiment of the application is shown. Figure 2 An enlarged structural schematic diagram of the connection between the busbar and the static contact at B in the figure is shown.

[0024] Figure 4 A structural schematic diagram of the busbar provided by the embodiment of the application is shown.

[0025] Figure 5 A structural schematic diagram of the connecting piece provided by the embodiment of the application is shown.

[0026] Figure 6 A structural schematic diagram of the connecting piece embedded in the busbar provided by the embodiment of the application is shown.

[0027] Figure 7A structural schematic diagram of the static contact in one direction is shown.

[0028] Figure 8 A structural schematic diagram of the static contact in another direction is shown.

[0029] Figure 9 A structural schematic diagram of the first fixed block and the second fixed block is shown.

[0030] Figure 10 A structural schematic diagram of the busbar clamp arranged between the first fixed block and the second fixed block is shown.

[0031] Figure 11 A structural schematic diagram of the static contact and the connecting piece connected through the fixing piece is shown.

[0032] Figure 12 A three-dimensional structural schematic diagram of the contact box is shown.

[0033] Figure 13 A front view structural schematic diagram of the contact box is shown.

[0034] Legend of reference signs:

[0035] 100, switch cabinet busbar system; 110, busbar; 111, first limiting hole; 120, connecting piece; 121, first mounting hole; 122, protruding part; 123, second limiting hole; 130, static contact; 131, first cylindrical structure; 1310, positioning hole; 1311, second mounting hole; 132, second cylindrical structure; 140, fixing piece; 150, fastener; 151, first fastener; 152, second fastener; 160a, first fixed block; 160b, second fixed block; 161, first arc-shaped end face; 162, first protruding part; 163, second arc-shaped end face; 164, second protruding part; 165, protrusion; 166, heat dissipation hole; 170, contact box; 171, fixed plate; 172, opening; 173, heat dissipation hole; 174, mounting flange. DETAILED DESCRIPTION

[0036] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0037] In the present application, the terms "first", "second" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise explicitly specified and limited.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "assembly", "connection" and other terms should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection; can be direct connection, can be indirect connection through intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the described features, structures or characteristics can be combined in any suitable way in one or more embodiments. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring the aspects of the present application.

[0040] Figure 1 A structural schematic diagram of the switch cabinet busbar system is shown. Figure 2 A structural schematic diagram of the switch cabinet busbar system is shown. Figure 1 A cross-sectional structural schematic diagram of the switch cabinet busbar system is shown. Figure 3 A structural schematic diagram of the switch cabinet busbar system is shown. Figure 2 An enlarged structural schematic diagram of the connection between the busbar and the static contact at B in the switch cabinet busbar system is shown. Figure 4 A structural schematic diagram of the switch cabinet busbar system is shown.

[0041] The embodiments of the present application provide a switch cabinet busbar system 100, which can be a large current switch cabinet. Referring to Figure 1 and Figure 2 As shown, the switch cabinet busbar system 100 includes a busbar 110, a connecting piece 120 and a static contact 130. The busbar 110 can be a round pipe type branch busbar 110, one end of which is a hollow structure, and the other end is provided with a flattened connection part, as shown in Figure 3 and Figure 4

[0042] Figure 5 A structural schematic diagram of the connecting piece is shown. Figure 6 A structural schematic diagram of the connecting piece embedded in the interior of the busbar is shown. ​

[0043] Referring to Figure 5 and Figure 6 As shown in

[0044] It should be noted that the connecting piece 120 is fixedly connected with the busbar 110, that is, the connecting piece 120 and the busbar 110 do not slide relative to each other.

[0045] Figure 7 A structure schematic diagram of the static contact in one direction is shown. Figure 8 A structure schematic diagram of the static contact in another direction is shown.

[0046] Referring to Figure 3 , Figure 7 and Figure 8 As shown in

[0047] Referring to Figure 3 and Figure 7 As shown in

[0048] When the busbar 110 is inserted into the positioning hole 1310, the static contact 130 is fixedly connected with the connecting piece 120 embedded in the hollow structure of the busbar 110, and since the connecting piece 120 is fixedly connected with the busbar 110, the static contact 130 is fixedly connected with the busbar 110 when the static contact 130 is fixedly connected with the connecting piece 120. That is, the static contact 130 is further tightly connected with the busbar 110 through the connecting piece 120, thereby improving the connection tightness between the static contact 130 and the busbar 110.

[0049] That is, the busbar 110 is tightly fitted with the positioning hole 1310 on the static contact 130, and the busbar 110 is fixedly connected with the static contact 130 through the connecting piece 120, so that the busbar 110 and the static contact 130 are tightly connected, the problem of difficult lapping of the tubular busbar 110 and the large-current static contact 130 is effectively solved, the application of the tubular busbar 110 on the large-current switch cabinet is realized, the connection cost between the busbar 110 and the static contact 130 is reduced, and then the cost of the large-current switch cabinet is reduced. In addition, the busbar 110 and the static contact 130 are connected through the connecting piece 120, which can also reduce the connection complexity between the busbar 110 and the static contact 130, so that the assembly process between the busbar 110 and the static contact 130 is more convenient.

[0050] In some embodiments, the outer diameter of the busbar 110 can be the same as the inner diameter of the positioning hole 1310, and the busbar 110 and the positioning hole 1310 can be connected by interference, so that the outer wall of the busbar 110 is tightly fitted with the inner wall of the positioning hole 1310, and a large friction force is generated between the outer wall of the busbar 110 and the inner wall of the positioning hole 1310, thereby avoiding relative sliding between the busbar 110 and the static contact 130.

[0051] In the present embodiment, the outer wall of the busbar 110 and the inner wall of the positioning hole 1310 can both adopt a gradually changing shape. Referring to FIG. 1, Figure 3 As shown in FIG. 1, in the direction from the busbar 110 to the static contact 130, the outer diameter of the busbar 110 gradually decreases, and the inner diameter of the positioning hole 1310 also gradually decreases, so that the outer wall of the busbar 110 is tightly fitted with the inner wall of the positioning hole 1310. The friction force between the outer wall of the busbar 110 and the inner wall of the positioning hole 1310 can be used to prevent sliding, and the assembly and disassembly convenience of the busbar 110 and the positioning hole 1310 can be improved.

[0052] The connecting piece 120 and the static contact 130 can be connected by a buckle, or can be connected by a screw, a bolt or the like, as long as the connecting piece 120 and the static contact 130 can be connected.

[0053] For example, referring to FIG. 1, Figure 3 , Figure 5 and Figure 7 As shown in FIG. 1, the side of the connecting piece 120 facing the static contact 130 is provided with a first mounting hole 121 extending in the axial direction thereof. The bottom of the positioning hole 1310 (the bottom of the first cylindrical structure 131) is provided with a second mounting hole 1311 penetrating in the axial direction thereof, and the second mounting hole 1311 and the first mounting hole 121 are oppositely arranged when the busbar 110 is inserted into the positioning hole 1310. The switch cabinet busbar system 100 further comprises a fixing piece 140, which can be inserted into the first mounting hole 121 and the second mounting hole 1311 to fixedly connect the static contact 130 and the connecting piece 120.

[0054] The fixing member 140 can be a bolt or other fixing structure to connect the static contact 130 and the connecting member 120. In addition, the connecting member 120 can have a first mounting hole 121, or two or more first mounting holes 121, and the bottom of the positioning hole 1310 can have the same number of second mounting holes 1311 as the connecting member 120.

[0055] It can be understood that when the connecting member 120 has multiple first mounting holes 121 and the bottom of the positioning hole 1310 has multiple second mounting holes 1311, the connection between the connecting member 120 and the static contact 130 can be more secure, and the static contact 130 and the connecting member 120 can be prevented from separating, thereby improving the connection between the static contact 130 and the tubular busbar 110.

[0056] For example, as shown in Figure 5 and Figure 7 , the connecting member 120 has four first mounting holes 121, which are spaced apart from each other. Correspondingly, the bottom of the positioning hole 1310 has four second mounting holes 1311, which are spaced apart from each other and correspond to the first mounting holes 121.

[0057] In this embodiment, as shown in Figure 3 and Figure 5 , the connecting member 120 has a protruding portion 122 protruding towards the static contact 130 on the side facing the static contact 130, and the protruding portion 122 is a circular boss structure. The end face of the protruding portion 122 facing the static contact 130 is closer to the bottom wall of the positioning hole 1310 than the end face of the busbar 110 facing the static contact 130, i.e. the protruding portion 122 protrudes outside the busbar 110. When the busbar 110 is inserted into the positioning hole 1310, the protruding portion 122 can prevent the busbar 110 from being inserted too deeply, so that the end face of the busbar 110 contacts the bottom wall of the positioning hole 1310 of the static contact 130, and the busbar 110 or the static contact 130 is not damaged.

[0058] It is worth mentioning that the connecting member 120 and the busbar 110 can be connected together by a thread connection between an inner thread and an outer thread, or by inserting a fastener 150 such as a screw or a bolt in the radial direction of the connecting member 120, or by a buckle or other connection.

[0059] In addition, the outer diameter of the connecting piece 120 and the inner diameter of the busbar 110 can also be tapered, for example, in the direction from the inside to the outside of the busbar 110, the outer diameter of the connecting piece 120 can gradually increase, and the inner diameter of the busbar 110 gradually increases. By designing the outer diameter of the connecting piece 120 and the inner diameter of the busbar 110 to be tapered, the connection tightness between the connecting piece 120 and the busbar 110 can be improved by using the friction between the outer wall of the connecting piece 120 and the inner wall of the busbar 110, and relative sliding between the connecting piece 120 and the busbar 110 can be avoided.

[0060] Of course, the connecting piece 120 and the busbar 110 can also be connected in other ways as long as the connecting piece 120 and the busbar 110 can be connected together.

[0061] For example, as shown in Figure 3 , Figure 4 and Figure 5 , the busbar 110 is provided with a first limiting hole 111, and the connecting piece 120 is provided with a second limiting hole 123, which corresponds to the first limiting hole 111 when the connecting piece 120 is inserted into the hollow structure of the busbar 110. The switch cabinet busbar system 100 further comprises a fastener 150, which can be a fastening structure such as a screw or a bolt, and the fastener 150 is inserted into the first limiting hole 111 and the second limiting hole 123 to fix the connecting piece 120 in the hollow structure of the busbar 110, so as to further limit the connection tightness between the connecting piece 120 and the busbar 110, and avoid relative sliding between the connecting piece 120 and the busbar 110.

[0062] Figure 9 The structure of the first fixing block and the second fixing block is shown. Figure 10 The structure of the busbar clamped between the first fixing block and the second fixing block is shown. Figure 11 The structure of the static contact and the connecting piece connected by the fixing piece is shown.

[0063] In this embodiment, as shown in Figure 9 , the switch cabinet busbar system 100 further comprises a first fixing block 160a and a second fixing block 160b connected to each other, and the first fixing block 160a and the second fixing block 160b can be mutually spliced and mutually split.

[0064] As shown in Figure 9 , when the first fixing block 160a and the second fixing block 160b are spliced, a through hole is formed between the first fixing block 160a and the second fixing block 160b, and the busbar 110 is sleeved in the through hole, i.e. the busbar 110 is clamped between the first fixing block 160a and the second fixing block 160b, so as to clamp the busbar 110 and limit the rotation of the busbar 110.

[0065] When the first fixing block 160a and the second fixing block 160b are separated from each other, the busbar 110 can be removed from between the first fixing block 160a and the second fixing block 160b to facilitate replacement or maintenance of the busbar 110.

[0066] It should be noted that the first fixing block 160a and the second fixing block 160b are fixedly connected to the busbar 110 and the connector 120 by fasteners 150. On the one hand, the first fixing block 160a and the second fixing block 160b can restrict the connector 120 from sliding within the busbar 110. On the other hand, it can also facilitate the connection between the busbar 110 and the contact box 170 described below, so that the busbar 110 and the contact box 170 have good alignment. The connection method between the busbar 110 and the contact box 170 is simpler and more convenient, reducing costs.

[0067] Furthermore, the first fixing block 160a and the second fixing block 160b are provided with a first connecting hole (not shown in the figure) and a second connecting hole (not shown in the figure) that penetrate radially through the connector 120. When the first fixing block 160a and the second fixing block 160b are assembled, the first connecting hole and the second connecting hole correspond to each other. Screws, bolts, or other fixing structures are inserted into the first connecting hole and the second connecting hole to connect the first fixing block 160a and the second fixing block 160b into one unit, preventing them from separating from each other.

[0068] In this embodiment, see Figure 9 As shown, the first fixing block 160a has a first arc-shaped end face 161, and the second fixing block 160b has a second arc-shaped end face 163. The arc dimensions of the first arc-shaped end face 161 and the second arc-shaped end face 163 are the same. After the first fixing block 160a and the second fixing block 160b are spliced ​​together, the first arc-shaped end face 161 and the second arc-shaped end face 163 are joined to form the aforementioned through hole.

[0069] It should be noted that, see Figure 9 As shown, the first arc-shaped end face 161 is provided with a first protrusion 162 extending toward the second fixing block 160b, and the second arc-shaped end face 163 is provided with a second protrusion 164 extending toward the first fixing block 160a. When the busbar 110 is clamped between the first fixing block 160a and the second fixing block 160b, the outer wall surface of the busbar 110 contacts the first protrusion 162 and the second protrusion 164. The first protrusion 162 and the second protrusion 164 can ensure the clamping effect of the busbar 110 and prevent the busbar 110 from shaking between the first fixing block 160a and the second fixing block 160b.

[0070] In the embodiment, the first arc-shaped end face 161 is provided with a plurality of first protruding portions 162, and the second arc-shaped end face 163 is provided with a plurality of second protruding portions 164. The plurality of first protruding portions 162 and the plurality of second protruding portions 164 can further improve the clamping force on the busbar 110, and prevent the busbar 110 from sliding relative to the first fixed block 160a and the second fixed block 160b.

[0071] For example, as shown in Figure 9 to Figure 11 three first protruding portions 162 are arranged at the two ends of the first arc-shaped end face 161 and the middle of the first arc-shaped end face 161. Correspondingly, the second arc-shaped end face 163 is provided with three second protruding portions 164, and the three second protruding portions 164 are arranged at the two ends of the second arc-shaped end face 163 and the middle of the second arc-shaped end face 163. The first protruding portion 162 at the end of the first arc-shaped end face 161 and the second protruding portion 164 at the end of the second arc-shaped end face 163 are spliced with each other, and the outer wall surface of the busbar 110 is in contact with the end surface of the first protruding portion 162 and the second protruding portion 164.

[0072] In the embodiment, as shown in Figure 3 to Figure 5 the busbar 110 is provided with two first limiting holes 111 arranged oppositely, and the connecting piece 120 is provided with two second limiting holes 123 arranged oppositely. As shown in Figure 3 , Figure 10 and Figure 11 the fastener 150 includes a first fastener 151 and a second fastener 152. The first fastener 151 is used to be inserted into a first limiting hole 111 and a second limiting hole 123, so as to connect the first fixed block 160a with the busbar 110 and the connecting piece 120. The second fastener 152 is used to be inserted into another first limiting hole 111 and another second limiting hole 123, so as to connect the second fixed block 160b with the busbar 110 and the connecting piece 120.

[0073] It can be understood that the two fasteners 150 can be used to connect the first fixed block 160a and the second fixed block 160b with the busbar 110 and the connecting piece 120, avoid penetrating the busbar 110 and the connecting piece 120, and improve the connection tightness of the first fixed block 160a, the second fixed block 160b, the busbar 110 and the connecting piece 120.

[0074] For example, the first fixed block 160a is provided with a first threaded hole (not shown in the figure), and the second fixed block 160b is provided with a second threaded hole (not shown in the figure). Both the first threaded hole and the second threaded hole are arranged in the radial direction of the connecting piece 120. When the first fixed block 160a and the second fixed block 160b clamp the busbar 110 therebetween, the first threaded hole corresponds to the first limiting hole 111 and the second limiting hole 123. The first fastener 151 is sequentially threaded through the first threaded hole, the first limiting hole 111, and the second limiting hole 123, and the second fastener 152 is sequentially threaded through the second threaded hole and the first limiting hole 111 and the second limiting hole 123 on the opposite side, so as to fix the first fixed block 160a and the second fixed block 160b to the busbar 110.

[0075] It can be understood that the first fixed block 160a and the second fixed block 160b can effectively clamp the busbar 110 and effectively separate the busbar 110 from the first fixed block 160a and the second fixed block 160b. The connection mode of the first fixed block 160a and the second fixed block 160b to the busbar 110 is simpler.

[0076] In the embodiment, as shown in Figure 9 and Figure 11 , the first fixed block 160a and the second fixed block 160b are provided with a plurality of protrusions 165, which extend in the axial direction of the connecting piece 120. For example, the first fixed block 160a and the second fixed block 160b are respectively provided with two protrusions 165.

[0077] Figure 12 A perspective structural schematic diagram of the contact box is shown. Figure 13 A front view structural schematic diagram of the contact box is shown.

[0078] As shown in Figure 1 , Figure 12 and Figure 13 , the switch cabinet busbar system 100 further comprises a contact box 170, which is a sleeve structure with one end open and the other end provided with a fixed plate 171. The fixed plate 171 is provided with an opening hole 172 corresponding to the protrusion 165. The protrusions 165 on the first fixed block 160a and the second fixed block 160b can be inserted into the opening hole 172 to fix the first fixed block 160a and the second fixed block 160b to the contact box 170.

[0079] Since the first fixed block 160a and the second fixed block 160b are fixedly connected with the busbar 110, when the first fixed block 160a and the second fixed block 160b are fixed on the contact box 170, that is, the busbar 110 is fixed on the contact box 170, the connection mode between the busbar 110 and the contact box 170 is simpler, and in addition, the busbar 110 and the contact box 170 can be centered, so that the busbar 110 has good centering degree and the accident rate is reduced.

[0080] In the embodiment, as shown in Figure 1 and Figure 9 , the first fixed block 160a and the second fixed block 160b are provided with heat dissipation holes 166 for discharging heat inside the contact box 170 and reducing the temperature inside the contact box 170.

[0081] For example, as shown in Figure 1 and Figure 9 , the first fixed block 160a is provided with an arc-shaped heat dissipation hole 166 located at the middle of the first fixed block 160a, and the second fixed block 160b is provided with two arc-shaped heat dissipation holes 166 which are symmetric about the center line of the second fixed block 160b.

[0082] It can be understood that, as shown in Figure 1 and Figure 12 , the contact box 170 is also provided with heat dissipation holes 173 which are arranged at intervals with the above-mentioned holes 172. The heat dissipation holes 173 can also be arc-shaped holes, and through the heat dissipation holes 173, the heat inside the contact box 170 can be reduced to avoid damage to the device due to high temperature.

[0083] In addition, as shown in Figure 1 and Figure 12 , the contact box 170 is provided with a mounting flange 174, and the mounting flange 174 is provided with a plurality of threaded holes. The threaded holes are penetrated by bolts or other structures to fix the mounting flange 174 on the switch cabinet, so as to fix the contact box 170 and the busbar 110 inside the switch cabinet.

[0084] The application also provides an air-insulated medium-voltage switchgear comprising the above-mentioned switch cabinet busbar system.

[0085] In the description of the specification, the description of the terms "some embodiments", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application. Any changes or modifications made in accordance with the claims and specification of the present application shall be within the scope of the present application.

Claims

1. A switchgear busbar system, characterized in that, The utility model relates to a switch cabinet bus system, comprising: a bus, one end of the bus being a hollow structure; a connecting piece, the connecting piece being inserted into the hollow structure of the bus and being fixedly connected with the bus; a static contact, one end of the static contact being provided with a positioning hole, one end of the bus inserted with the connecting piece being capable of being inserted into the positioning hole and being tightly fitted with the positioning hole, and the static contact being fixedly connected with the connecting piece so that the static contact is fixedly connected with the bus.

2. The switchgear bus system of claim 1, wherein, The outer wall of the bus is fitted with the inner wall of the positioning hole. In the direction from the bus to the static contact, the outer diameter of the bus gradually decreases, and the hole diameter of the positioning hole gradually decreases.

3. The switchgear bus system of claim 1, wherein, The side of the connecting piece facing the static contact is provided with a first mounting hole extending in the axial direction thereof; The bottom of the positioning hole is provided with a second mounting hole extending in the axial direction thereof, and the second mounting hole corresponds to the first mounting hole when the bus is inserted into the positioning hole. The switch cabinet bus system further comprises a fixing piece inserted into the first mounting hole and the second mounting hole to connect the static contact and the connecting piece.

4. The switchgear bus system of claim 3, wherein, The side of the connecting piece facing the static contact is provided with a protruding portion protruding towards the side of the static contact, and the end face of the protruding portion facing the static contact is closer to the bottom wall of the positioning hole than the end face of the bus facing the static contact.

5. The switchgear bus system of claim 1, wherein, The bus is provided with a first limiting hole, and the connecting piece is provided with a second limiting hole, the second limiting hole corresponding to the first limiting hole when the connecting piece is inserted into the hollow structure of the bus. The switch cabinet bus system further comprises a fastener inserted into the first limiting hole and the second limiting hole to fix the connecting piece in the hollow structure of the bus.

6. The switchgear bus system of claim 5, wherein, The switch cabinet bus system further comprises a first fixing block and a second fixing block connected with each other, the bus being clamped between the first fixing block and the second fixing block, and the first fixing block and the second fixing block being fixedly connected with the bus and the connecting piece through the fastener.

7. The switchgear bus system of claim 6, wherein, The fastener comprises: a first fastener for connecting the first fixing block, the bus and the connecting piece; a second fastener for connecting the second fixing block, the bus and the connecting piece, and the second fastener being oppositely arranged with the first fastener.

8. The switchgear bus system of claim 6, wherein, The first fixing block and the second fixing block are each provided with a plurality of protrusions. The switch cabinet bus system further comprises a contact box, the contact box being a sleeve type structure, one end of the contact box being open, the other end of the contact box being provided with a fixing plate, the fixing plate being provided with an opening corresponding to the protrusions, and the protrusions being capable of being inserted into the opening to fix the first fixing block and the second fixing block on the contact box.

9. The switchgear bus system of claim 6, wherein, The first fixing block and the second fixing block are provided with heat dissipation holes.

10. An air-insulated medium voltage switchgear, characterized by The utility model relates to a switch cabinet bus system comprising any one of claims 1-9.

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